// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef BASE_I18N_ICU_STRING_CONVERSIONS_H_
#define BASE_I18N_ICU_STRING_CONVERSIONS_H_

#include <string>

#include "base/i18n/base_i18n_export.h"
#include "base/i18n/i18n_constants.h"
#include "base/strings/string16.h"

namespace base {

// Defines the error handling modes of UTF16ToCodepage and CodepageToUTF16.
class OnStringConversionError {
public:
    enum Type {
        // The function will return failure. The output buffer will be empty.
        FAIL,

        // The offending characters are skipped and the conversion will proceed as
        // if they did not exist.
        SKIP,

        // When converting to Unicode, the offending byte sequences are substituted
        // by Unicode replacement character (U+FFFD). When converting from Unicode,
        // this is the same as SKIP.
        SUBSTITUTE,
    };

private:
    OnStringConversionError();
};

// Converts between UTF-16 strings and the encoding specified.  If the
// encoding doesn't exist or the encoding fails (when on_error is FAIL),
// returns false.
BASE_I18N_EXPORT bool UTF16ToCodepage(const string16& utf16,
    const char* codepage_name,
    OnStringConversionError::Type on_error,
    std::string* encoded);
BASE_I18N_EXPORT bool CodepageToUTF16(const std::string& encoded,
    const char* codepage_name,
    OnStringConversionError::Type on_error,
    string16* utf16);

// Converts from any codepage to UTF-8 and ensures the resulting UTF-8 is
// normalized.
BASE_I18N_EXPORT bool ConvertToUtf8AndNormalize(const std::string& text,
    const std::string& charset,
    std::string* result);

} // namespace base

#endif // BASE_I18N_ICU_STRING_CONVERSIONS_H_
